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rfid: lower MFRC522 SPI clock to 2 MHz for clone-reader self-test stability

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Rasmus
2026-09-10 06:11:44 +02:00
parent 663fb0643f
commit 3f230283da
1 changed files with 3 additions and 2 deletions
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5
main/rfid_manager.c
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@@ -22,8 +22,9 @@ static const char *TAG = "rfid";
#define RC522_TASK_PRIORITY (4) #define RC522_TASK_PRIORITY (4)
/* Conservative clock for MFRC522 clones. If the FIFO self-test still /* Conservative clock for MFRC522 clones. If the FIFO self-test still
* reports a mismatch at boot, lower this (e.g. 2000000) or check power. */ * reports a mismatch at boot, lower this further (e.g. 1000000) or check
#define RC522_SPI_CLK_HZ (4000000) * power/wiring. Many clone readers glitch at 4MHz on a shared bus. */
#define RC522_SPI_CLK_HZ (2000000)
#define RC522_START_ATTEMPTS (3) #define RC522_START_ATTEMPTS (3)
static rc522_driver_handle_t s_driver; static rc522_driver_handle_t s_driver;